Need Some Smallblock Info.

The Crane retrofit hyd / roller cams are a steel billet cam with a cast gear so you can use your stock type pump drive and gear. I don't know if the Comp retrofit cams are the same design. Apart from that there is a 'Sardi' [sp] billet that is tough enough for a roller applications and you can also use your stock type pump drive gear on it. This is what most of the custom grinders use for hydraulic roller grinds.